Shieldwall

You become trained in group combat. While you are wielding a shield, you gain the following benefits:

• You gain a +1 to your AC against melee attacks (max +2) for every friendly creature within 5ft.
• You gain a +1 to your AC against ranged attacks (max +4) for every friendly creature within 5ft.

• Hostile creatures attacking you, from below or directly behind the direction you are facing, gain a +4 bonus to their attack roll..